Dual-mode vehicle-mounted signal receiving judgment method and device

Abstract

The invention provides a dual-mode judgment vehicle-mounted signal receiving method and device, and relates to the technical field of railway locomotive vehicle-mounted signal processing. The device comprises a coil induction system for acquiring a ground positioning magnetic signal and generating a corresponding analog quantity induction signal, and a Hall chip module for detecting the magnetic field polarity of the ground positioning magnetic signal, the signal judging and processing unit is used for carrying out matching analysis on the analog quantity induction signal and the magnetic field polarity detection result and outputting an effective positioning signal; and the signal output interface is used for transmitting the effective positioning signal to vehicle-mounted control equipment. The influence of external electromagnetic interference on the vehicle-mounted automatic neutral section passing system of the high-speed rail motor train unit can be remarkably reduced, and the accuracy, stability and reliability of signal receiving are improved; by identifying and judging the polarity of the magnetic field, the accuracy of signal transmission is improved, so that the overall safety of railway transportation is enhanced; and meanwhile, the production, maintenance and upgrading costs are reduced through the modular design.

Description

Technical Field

[0001] This invention relates to the field of onboard signal processing technology for railway locomotives and rolling stock, and more specifically, to a dual-mode judgment method and device for onboard signal reception. Background Technology

[0002] In modern high-speed train automatic phase-crossing control systems, onboard signal reception is a crucial component for the normal operation of the system. This part ensures the safe and reliable passage of the train through the phase-crossing zone by receiving and analyzing positioning signals from the trackside. However, due to the influence of external electromagnetic fields and magnetized rails, traditional signal reception methods may output erroneous signals, posing a potential threat to the train's operational safety. Especially in the complex operating environment of high-speed trains, the frequent occurrence of external electromagnetic interference presents greater challenges to existing reception methods, requiring more reliable signal reception and processing capabilities.

[0003] In existing technologies, vehicle-mounted signal reception mainly relies on coil induction systems or Hall effect sensors to detect ground positioning magnetic signals. For example, coil induction systems generate analog electrical signals by capturing changes in the magnetic field, and then perform rectification, filtering, and amplification to extract positioning information; Hall effect sensors, on the other hand, utilize the principle of magnetic field polarity induction and are gradually being applied to the field of signal detection to improve the response accuracy to magnetic signals.

[0004] However, existing signal reception methods have significant shortcomings in complex operating environments. Due to the influence of external electromagnetic interference, magnetized rails, and turnouts, traditional methods are prone to signal misjudgment or outputting incorrect information, leading to inaccurate transmission by the automatic over-phase control system and posing a potential threat to the safety of high-speed train operation. Especially in high-frequency interference scenarios, single-mode signal processing is insufficient to effectively filter false signals, necessitating more advanced integrated technologies to improve system stability and reliability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a dual-mode vehicle signal receiving method and device. By integrating coil signal sensing technology and Hall effect magnetic field polarity determination technology, interference signals can be effectively identified and filtered, thereby ensuring the accuracy, stability and reliability of the output signal.

[0006] To achieve the above objectives, the main technical solution adopted by the present invention is as follows: On the one hand, a dual-mode method for determining vehicle signal reception is provided, including the following steps: Ground positioning magnetic signals are acquired through a coil induction system, generating corresponding analog induction signals. The magnetic field polarity of the ground positioning magnetic signals is detected by a Hall chip module to obtain a magnetic field polarity detection result. The analog induction signals are rectified, filtered, and amplified to obtain a processed signal for intensity determination. The processed signal is matched with the magnetic field polarity detection result by a signal judgment processing unit. When both meet preset judgment conditions, it is determined to be a valid positioning signal. The valid positioning signal is output to the vehicle control equipment through a signal output interface.

[0007] Furthermore, the filtering process includes pulse width filtering of the coil induction signal to filter out short-pulse interference caused by the external electromagnetic environment.

[0008] Furthermore, the Hall chip module employs a planar Hall effect sensor and determines the polarity of the positioning magnet by comparing the magnetic field direction, thereby identifying the normal positioning magnetic field from the magnetized rail or other sources of interference magnetic fields.

[0009] Furthermore, the signal judgment and processing unit performs a joint judgment on the processed signal and the magnetic polarity detection result based on the set amplitude threshold, time threshold and magnetic polarity logic condition.

[0010] Furthermore, in actual railway line environments, by adjusting the sensitivity of the Hall chip module and the signal strength threshold of the coil induction system, the signal judgment and processing unit can adapt to the interference identification requirements under different electromagnetic environments.

[0011] On the other hand, a dual-mode vehicle signal receiving device is provided, comprising: A coil induction system is used to acquire ground positioning magnetic signals and generate corresponding analog induction signals; Hall effect chip module, used to detect the magnetic field polarity of the ground positioning magnetic signal; The signal judgment and processing unit is used to perform matching analysis on the analog quantity sensing signal and the magnetic field polarity detection result, and output a valid positioning signal; A signal output interface is provided for transmitting the effective positioning signal to the vehicle control device. The signal judgment and processing unit outputs a valid positioning signal only when the analog quantity sensing signal meets a preset condition and the magnetic field polarity detection result meets a preset polarity judgment condition.

[0012] Furthermore, the coil induction system includes an induction coil and an amplifier circuit electrically connected to the induction coil, the amplifier circuit having low-noise amplification and wide bandwidth characteristics.

[0013] Furthermore, the Hall chip module is a high-sensitivity planar Hall effect sensor and has an adjustable sensitivity polarity recognition function.

[0014] Furthermore, the signal determination and processing unit includes: Signal processing circuits used for rectifying, pulse width filtering, and amplifying analog signals from coils; logic control chips used for executing preset judgment algorithms and outputting judgment results.

[0015] Furthermore, the signal output interface is a standard interface compatible with vehicle control equipment, and the effective positioning signal is output in a digital output manner.

[0016] The present invention has the following beneficial effects and advantages: First, this invention effectively overcomes the signal misjudgment problem caused by the susceptibility of traditional signal reception methods to external electromagnetic interference, magnetized rails, and turnouts through a dual-mode judgment mechanism. This scheme requires both the analog induction signal and the magnetic field polarity detection result to simultaneously meet preset conditions before a valid signal can be output, thereby significantly improving the accuracy and stability of signal reception, avoiding the output of spurious signals in a single mode, and reducing the risk of erroneous information transmission in automatic over-phase control systems.

[0017] Secondly, in complex operating environments, this invention enhances the system's anti-interference capability, overcoming the shortcomings of inadequate signal processing in high-frequency interference scenarios in existing technologies. Through the joint judgment of pulse width filtering, amplitude threshold, and magnetic polarity logic, as well as adjustable sensitivity and threshold settings, the equipment can adapt to the electromagnetic environment of different railway lines, achieving effective filtering and identification of interference signals. This not only improves the safety of high-speed train operation and reduces potential accident hazards, but also enhances the overall reliability and automation level of railway transportation.

[0018] Furthermore, the device of the present invention is compact and modular in design, making it easy to integrate with existing EMU control systems and reducing production, maintenance and upgrade costs. Attached Figure Description

[0019] Figure 1 This is a block diagram illustrating the working principle of a dual-mode vehicle signal receiving method and device according to the present invention. Figure 2 This is a flowchart of the Hall chip module operation of a dual-mode vehicle signal receiving method and device of the present invention; Figure 3 This is a circuit diagram of a dual-mode vehicle signal receiving method and device according to the present invention. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] like Figures 1 to 3 As shown, a dual-mode vehicle signal reception method of the present invention includes the following steps: Synchronous acquisition and detection of magnetic signals: When the vehicle-mounted equipment passes a ground positioning magnet in the phase-splitting zone during operation, the coil induction system and the Hall chip module simultaneously sense the change in magnetic field. The coil induction system senses the change in magnetic flux generated by the ground magnet and outputs an analog electrical signal; the Hall chip module detects the polarity direction of the same magnetic field and outputs an electrical signal indicating the polarity of the magnetic field. The synchronous acquisition of these two signals ensures that the two sources of information used for subsequent judgments are consistent and reliable.

[0022] Analog signal processing for coils: Analog signals generated by coils typically contain the target magnetic signal component and stray interference from the electromagnetic environment. This invention improves signal validity through the following processing steps: Rectification: Converts the AC signal induced by the coil into a unidirectional signal, which facilitates stable amplitude analysis.

[0023] Pulse width filtering: The signal time width is filtered to suppress short pulse interference, thereby preserving the positioning magnetic signal components with characteristic duration.

[0024] Amplification: The signal amplitude is increased by using a low-noise, wide-bandwidth amplifier circuit to improve the accuracy of subsequent judgment.

[0025] The signal obtained after the above processing reflects the magnetic field strength characteristics and is used to determine whether a valid magnetic positioning point exists. Hall chip polarity determination: The Hall chip module uses a planar Hall effect sensor to detect the direction of the magnetic field. The determination of magnetic field polarity distinguishes between two types of situations: the target magnetic field generated by the ground positioning magnet (polarity conforms to the preset direction); and interfering magnetic fields caused by rail magnetization and external electromagnetic fields (polarity does not conform to the preset direction). The polarity determination result is output in digital form for dual-mode matching.

[0026] Dual-mode joint judgment: The signal judgment and processing unit receives the analog signal processed by the coil and the polarity judgment result of the Hall chip, and performs matching analysis according to preset logic conditions. The preset conditions include, but are not limited to: the amplitude threshold of the analog signal, the time threshold of the analog signal, and the judgment condition of whether the polarity is met or not. Only when the above two signals meet the conditions at the same time will the signal judgment and processing unit determine that the received signal is a valid surface positioning signal.

[0027] This "dual-mode confirmation" method can significantly reduce misjudgments caused by a single abnormal signal and improve overall recognition accuracy.

[0028] Valid signal output: Once the signal processing unit determines that the input signal is a valid positioning signal, it sends the standardized positioning signal to the EMU automatic phase-crossing control equipment through the on-board signal output interface. This output signal is in digital form, which facilitates direct parsing by existing on-board control systems and ensures electrical compatibility.

[0029] During the equipment commissioning phase, the sensitivity and threshold settings of the Hall sensor were adjusted to enable it to effectively distinguish between interference sources and normal operating signals in different railway environments. Post-commissioning data shows that the equipment can maintain high-precision signal identification and transmission even in complex electromagnetic environments.

[0030] On the other hand, the present invention also provides a dual-mode vehicle signal receiving device, comprising: The coil induction system comprises a high-performance induction coil and a connected signal amplification circuit. It acquires ground positioning magnetic signals and generates corresponding analog induction signals. The coil is designed according to specific winding rules to ensure the capture of strong magnetic points. The generated signal is then rectified, filtered, and amplified. The amplification circuit needs to have low-noise amplification and wide bandwidth characteristics to minimize errors during signal processing. The coil induction system outputs an analog signal, which enters the signal judgment and processing unit.

[0031] The Hall effect chip module is used to detect the magnetic field polarity of the ground positioning magnetic signal. The Hall effect chip employs a highly sensitive planar Hall effect sensor, and its core function is to accurately determine the polarity of the ambient magnetic field and output a digital signal of the magnetic field polarity to assist in identifying the presence of a valid positioning magnetic field. Selecting a suitable Hall effect chip is a crucial step; it should ensure fast response speed and strong anti-interference capability.

[0032] The signal processing unit includes a signal processing circuit and a logic control chip. The signal processing circuit rectifies, pulse-width filters, and amplifies the analog signal from the coil. The logic control chip executes a preset judgment algorithm and outputs the judgment result. When executing the preset judgment algorithm, if one of the two Hall effect chips determines that the magnetic field of the ground positioning point is N-pole, it outputs a signal to an AND gate. When the coil output signal meets a set value, it also outputs a signal to the AND gate. The AND gate then performs matching analysis based on the analog signal and the magnetic field polarity detection result and outputs a valid positioning signal. Users can accurately distinguish between normal operating signals and environmental interference signals by adjusting the device's sensitivity and threshold settings. The control algorithm, based on magnetic field polarity judgment and signal morphology analysis, effectively filters out false signals. A valid positioning signal is output only when the analog signal meets the preset conditions and the magnetic field polarity detection result meets the preset polarity judgment conditions.

[0033] The signal output interface is a standard interface compatible with the on-board control equipment, and it uses digital output to output the effective positioning signal, which is used to transmit the effective positioning signal to the on-board control equipment. The design of this interface needs to be compatible with the existing on-board control system of the EMU automatic phase transition, to ensure that the signal can be seamlessly integrated and play a role in the EMU automatic phase transition operating system.

[0034] During equipment assembly, all components must be tightly connected and have unobstructed interfaces to avoid any loss or distortion in signal transmission. After assembly, all parts must undergo rigorous calibration and testing to ensure stable equipment operation and high-precision signal output.

[0035] In addition to laboratory testing, the equipment also needs to be debugged in actual railway operating environments. Different railway lines and transport environments are selected, and the equipment's operating parameters are gradually adjusted, with each debugging session recording the accuracy changes. This not only ensures that the receiving equipment maintains signal accuracy in a changing electromagnetic environment but also provides a basis for standardized adjustments to the equipment.

[0036] To improve ease of operation and maintenance, a modular disassembly and assembly structure is required to facilitate rapid repair and replacement in different hardware environments. The design should consider the use of durable materials to extend service life and reduce additional costs associated with replacement or maintenance.

[0037] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A dual-mode determination method for vehicle signal reception, characterized in that, Includes the following steps: Ground positioning magnetic signals are acquired through a coil induction system, generating corresponding analog induction signals. The magnetic field polarity of the ground positioning magnetic signals is detected by a Hall chip module to obtain a magnetic field polarity detection result. The analog induction signals are rectified, filtered, and amplified to obtain a processed signal for intensity determination. The processed signal is matched with the magnetic field polarity detection result by a signal judgment processing unit. When both meet preset judgment conditions, it is determined to be a valid positioning signal. The valid positioning signal is output to the vehicle control equipment through a signal output interface.

2. The dual-mode vehicle signal receiving method according to claim 1, characterized in that, The filtering process includes pulse width filtering of the coil induction signal to filter out short-pulse interference caused by the external electromagnetic environment.

3. The dual-mode vehicle signal receiving method according to claim 1, characterized in that, The Hall chip module uses a planar Hall effect sensor and determines the polarity of the positioning magnet by comparing the direction of the magnetic field, so as to identify the normal positioning magnetic field and the interference magnetic field from the magnetized rail or other sources.

4. The dual-mode vehicle signal receiving method according to claim 1, characterized in that, The signal judgment and processing unit performs a joint judgment on the processed signal and the magnetic polarity detection result based on the set amplitude threshold, time threshold and magnetic polarity logic condition.

5. The dual-mode vehicle signal receiving method according to claim 1, characterized in that, In actual railway line environments, by adjusting the sensitivity of the Hall chip module and the signal strength threshold of the coil induction system, the signal judgment and processing unit can adapt to the interference identification requirements under different electromagnetic environments.

6. A dual-mode vehicle signal receiving device, characterized in that, include: A coil induction system is used to acquire ground positioning magnetic signals and generate corresponding analog induction signals; Hall effect chip module, used to detect the magnetic field polarity of the ground positioning magnetic signal; The signal judgment and processing unit is used to perform matching analysis on the analog quantity sensing signal and the magnetic field polarity detection result, and output a valid positioning signal; A signal output interface is provided for transmitting the effective positioning signal to the vehicle control device. The signal judgment and processing unit outputs a valid positioning signal only when the analog quantity sensing signal meets a preset condition and the magnetic field polarity detection result meets a preset polarity judgment condition.

7. The dual-mode vehicle signal receiving device according to claim 6, characterized in that, The coil induction system includes an induction coil and an amplifier circuit electrically connected to the induction coil. The amplifier circuit has low-noise amplification and wide bandwidth characteristics.

8. A dual-mode vehicle signal receiving device according to claim 6, characterized in that, The Hall chip module is a high-sensitivity planar Hall effect sensor with adjustable sensitivity and polarity recognition function.

9. A dual-mode vehicle signal receiving device according to claim 6, characterized in that, The signal determination and processing unit includes: Signal processing circuits used for rectifying, pulse width filtering, and amplifying analog signals from coils; logic control chips used for executing preset judgment algorithms and outputting judgment results.

10. A dual-mode vehicle signal receiving device according to claim 6, characterized in that, The signal output interface is a standard interface compatible with vehicle control equipment, and the effective positioning signal is output in a digital output mode.

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